Javascript Embedding

On client page

```html
<re-widget type="youtube" src="https://www.youtube.com/embed/TwAFQZLK79A"></re-widget>

  <script>
    (function (fn) {
      var d = document, s = d.createElement('script');
      s.onload = fn; d.head.appendChild(s); s.src = 'embed.js';
    })(function () {
      MyLib.init({
        message: 'Hello'
      })
    });
  </script>
```

embed.js

```
var MyLib = {
  config: {
    name: 'Hello'
  },
  init: function(config) {
    this.config = config
    var widgets = document.querySelectorAll('re-widget')
    widgets.forEach(function(e) {
      e.innerHTML = ''
      var f = document.createElement('iframe')
      f.style.width = '100%'
      f.style.height = '100vh'
      f.frameBorder = 0
      f.allowfullscreen = true
      f.src = e.getAttribute('src')
      e.appendChild(f)
      console.log(e.attributes)
    })
  }
}
```